28268813481256 has 16 divisors (see below), whose sum is σ = 53642627992800. Its totient is φ = 13964112683184.

The previous prime is 28268813481217. The next prime is 28268813481283. The reversal of 28268813481256 is 65218431886282.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21286756476 + ... + 21286757803.

It is an arithmetic number, because the mean of its divisors is an integer number (3352664249550).

Almost surely, 2^{28268813481256} is an apocalyptic number.

It is an amenable number.

28268813481256 is a deficient number, since it is larger than the sum of its proper divisors (25373814511544).

28268813481256 is a wasteful number, since it uses less digits than its factorization.

28268813481256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42573514368 (or 42573514364 counting only the distinct ones).

The product of its digits is 70778880, while the sum is 64.

The spelling of 28268813481256 in words is "twenty-eight trillion, two hundred sixty-eight billion, eight hundred thirteen million, four hundred eighty-one thousand, two hundred fifty-six".